Growing up too fast. . .

A couple nights ago, I put Lily's booster seat in the tub with her to wash it up and store it away, since she really doesn't need it anymore. As I was drying it off, she asked me what I was doing.
"You don't need this seat anymore. You are a big girl."
"I am a big girl?" she asked incredulously.
"Yep. You're getting big."
With a sudden intake of her breath she exclaimed, "Now I can shave!"